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138724-23-9

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138724-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138724-23-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,2 and 4 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138724-23:
(8*1)+(7*3)+(6*8)+(5*7)+(4*2)+(3*4)+(2*2)+(1*3)=139
139 % 10 = 9
So 138724-23-9 is a valid CAS Registry Number.

138724-23-9Relevant articles and documents

Toward the Development of Radiolabeled Fluorophenyl Azide-Based Photolabeling Reagents: Synthesis and Photolysis of Iodinated 4-Azidoperfluorobenzoates and 4-Azido-3,5,6-trifluorobenzoates

Cai, Sui Xiong,Glenn, Dennis J.,Keana, John F. W.

, p. 1299 - 1304 (1992)

Two approaches for the incorporation of iodine into funtionalized perfluorophenyl azides (PFPAs) were demonstrated by the synthesis of 3, 5, and 8, with the azido and iodo groups in the same aryl ring, and 14 and 15, with the azido and iodo groups in diff

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